Charles dion



C. DION.

Fire Alarm. No. 49,686.

Patented Aug. '29, 1865;

UNITED STATES PATENT OFFICE.

CHARLES DION, OF MONTREAL, CANADA.

FIRE-ALARM.

Specification forming part of Letters Patent No. 49,686, dated August 29, 1865.

To all whom it may concern clock-movement B, which is driven by a spring Be it known that I, CHARLES'DION, ol Monor weight, and from the escapement of which treal, Canada, have invented a new and Imextends a hammer, O, which, when the clockproved Fire-Alarm; and I do hereby declare movement. is in motion, strikes repeated and that the following is a full, clear, and exact rapid blows on a bell, D. The escapement is description thereof, which will enable others secured to a rock-shaft, a, and from this rockskilledin the artto makeandusethe same,refershaft extends an arm, I), the point of which ence being had to the accompanying drawings, may be made to catch in the looped end of a forming part of this specification, in whichswinging lever, c. The lower arm of this lever Figure 1 represents afront elevation of this branches off, and one branch hears a small invention. Fig. 2is a side elevation of the same. weight, whereas its other branch rests against Similar letters of reference indicate like the trigger d. This trigger is hinged to a piece parts. ofpipe, E, and it may be so arranged that its This invention relates to an apparatus the point arrests the chain or cord from which the operation of which is based upon the expanweight is suspended which is intended to imsion and contraction of a spring composed of part motion to the clock-movement. two different metals or other materials. The The time when the cscapement of the clockouter end of this spring is connected to an elmovement is released is governed by the acbow-lever, which is secured to a vertical arbor tion of an index-hand, F, which is mounted on bearing an index which sweeps over an adjustan arbor, e, that has its hearings in a bracket able scale, and when the temperature rises besecured to a segmental plate, G. This segyond the desired point said index, by coming mental plate is pivoted to the bed-plate A, and in contact with the end of a lever, releases a it supports the coiled spring H and the scale tilting weight, and by the action of this tilt- I. The spring is composed of'two strips of ing weight another similar weight is released, ditferent metals-such as steel and brass--one and thereby the escapement of a clock-moveof which expands less by the heat than the ment is freed, and said movement being driven other, and it is secured at its inner end to the by aweight or spring causes a hammer to strike plate, whereas its outer end connects by a link, repeated and rapid blows on a bell, so that the f, with a curved arm, g, secured to the arbor e. attention of persons in the room, building, or Then the spring expands by the action of the other structure is called to the fact that the heat the outer end of the same springs in the temperature has reached its maximum. The direction of arrow 1, and the index F turns in scale and spring are situated on acommon bedthe direction of arrow 2. plate,andby adjusting this bed-platethepoint, If it is desired that the alarm shall sound when the alarm is released, can be adjusted at when the temperature reaches 80, the seg pleasure. A similar arrangement is also used mental plate is shifted in such a position that when the temperature sinks below a certain one arm of a lever, h, stands opposite to the point. By the application of suitable tubes or figure 80 on the scale. Said lever is pivoted guide-channelsin which globes or balls ofstone to a standard, 1', and its long arm is furnished or other suitable material are retained by stops with a loop, j, which can be made to catch over which are released by the action of the index the point of a weighted trippingarm, 70. This or compound spring the room or place in a arm is so arranged that when the same is set building in which the temperature rises or falls free it turns down by the action of its own inbeyond the desired degree can be ascertained herent gravity in the direction of the arrow in the office or other place in which the sevmarked nearitinFi g. 1, and by striking alever, eral pipes center, the number of the room be- I, releases another tripping-lever, m, which has ing ascertained by a corresponding figure or its fulcrum on alug, a, secured to the bed-pla appropriate mark on the ball. in such a position that when the lever is Set A represents a plate of sheet metal or any free the weight secured to its outer end com other suitable material, and out out in any dedown upon the tail of the trigger (I. By this sirable form or shape. This plate supports the action the trigger is caused to turn the swinginglevero in the direction of the arrow marked in the office or other central place, so that the nearit in Fig. l, compelling the same to reproper persons are enabled to ascertain the lease the arm b, extending from the arbor of state of the temperature throughout the entire the escapement, and the alarm is sounded. building.

Byturningthe segmental plateGupordowu, If desired, the apparatus may also be conthe alarm can be made to sound at any desirnected to a system of telegraphic instruments, able degree of heat, and it the apparatus is and thereby the fire department or the police hung up in a room orin a store-house or in the may be advised instantaneouslyin which buildhold of a vessel and set to a certain temperaing a fire occurs. ture--say 80 the alarm will be sounded as I claim as new and desire to secure by Let soon as the temperature rises beyond this point. ters Paten t A fire caused by some accident or by sponta- 1. The adj stable segmental plate G, bearing neous combustion can thus be readily detected, the composition spring H, index F, and scale and much property will be saved from destrucin combination with the alarm-movementB tion by a comparatively small outlay. constructed and operating substantially as and In order to sound the alarm when the temfor the purpose described. perature sinks below a certain degree, a weight- 2. The stop-leverh, tri ppi n g-lever k, stop-lever ed lever, 19, is arranged in such a position that l, trip-lever m, trigger d, and swinging lever c, itsend passes through a loop, 1, which is secured to the end of the index F. VVhen-the temperature sinks below the required point the leverp tilts, and may be made to cause the I 3. The use of a system of tubes extending l alarm to sound, or it may be made to act on a stop, 8, which extends into a tube, '1, and retains a ball, 2. When the stop is Withdrawn is below the desired point. A similar tube, E, substantially as and for the purposes set forth.

and ball t may be set free by the trigger d to G. DION. indicate the place or room Where the temper- Witnesses ature is too high. The several tubes in a hotel M. M. LIVINGSTON,

or other building may be made to concentrate WM. F. MONAMARA. 

